Putra, I. P., H. . Witriyono, M. H. . Rifqo, and M. Muntahanah. “Utilization of Base64 Encryption Repetition for QR Code Presence on Online Attendance”. Jurnal Komputer, Informasi Dan Teknologi, vol. 2, no. 2, Dec. 2022, pp. 519–528, doi:10.53697/jkomitek.v2i2.942.